Eliet DZC450, Руководство пользователя

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92
English
I. Tensioning roller of the belt tensioner and blade drive
The running roller that tightens the belt when the blade decou-
pling lever is pressed is under extreme pressure:
• The runner rotates against the belt at 2,300 RPM.
• Due to friction with the belt the latter becomes very hot; lubri-
cants become liquid and will leak from the bearings as a result.
• During periods of drought, dust will inevitably develop when
operating the machine. Sand and dust will find their way into
the bearings and cause damage.
Due to the combination of these three factors the tensioning roller is sensitive to wear. Regu-
lar lubrication can counter accelerated wear.
As soon as the bearings start to make a growling sound, replace the bearings of the tensio-
ning roller as a precaution. In the event of wear on the tread, the complete tensioning roller
must be replaced. Failure to do this will result in blockage of the tensioning roller and conse-
quently, damage or breakage of the belt.
How to proceed:
• Disassemble the protective cover of the machine (read § 15.1; page 99)
• Turn loose the centre M8 bolt from the tensioning roller, hold the nut against the direction of
rotation on the back side of the tensioning roller's holder (socket wrench and ring wrench 13).
• If there is serious damage or wear and tear on the tread, then the tensioning roller should
be replaced. The tensioning roller can be ordered from an authorised ELIET dealer. (order
code MPA 01 350 030)
• If the tread exhibits no severe wear and tear, then you should only replace the bearings.
• For stability purposes, this tension roller is provided with two bearings.
• On the front of the roller, you will notice a safety clip, which secures those bearings in the
compartment. Using a special tong, you will be able to remove the safety clip.
• Using an axle and a hammer, the bearings can be tapped out of the compartment. To simplify
this, you can spray some penetrating oil onto the bearings beforehand.
• The replacement bearings can be ordered from an authorised ELIET Service Center.
(order code BL 001 203 703) (x2)
• Press the new bearings into the compartment evenly. For this, press on the outer casing of
the bearing, taking particular care not to damage the dirt seal.
• If the two bearings are pushed in completely to the back of the compartment, then secure
them into place by putting the safety clip back into the groove.
• Apply some extra lubricant to the bearing joints to avoid dirt penetrating around the new
tensioning roller.
• Remount all elements to their original position and securely tighten the tensioning roller.
• Re-assemble the black cover as it was originally. (read § 15.1; page 99)